This document discusses cloud computing, including what it is, why organizations use it, how it works, common users, and advantages and disadvantages. It notes that cloud computing provides economies of scale, diversity and aggregation of resources, and flexibility. Common users include web and software companies, small and medium businesses, and high-traffic websites. The main advantages are flexibility, easy access, low costs, and less labor intensity, while the primary disadvantages are loss of control, potential privacy and security risks, lack of support, and downtime if internet connections fail.